Serena Williams gives the thumbs up as she holds her trophy after defeating her sister Venus in the women’s singles final on the Centre Court at the All England Lawn Tennis Championships at Wimbledon, Saturday July 5, 2003. (AP Photo/Jytte Nielsen, File)
By HOWARD FENDRICH AP Sports Writer Saying “the countdown has begun,” 23-time Grand Slam champion Serena Williams announced Tuesday she is ready to step away…
